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HELP NEEDED !!! PLEASE
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HELP NEEDED !!! PLEASE

HELP NEEDED !!! PLEASE-example-1
User Pandian
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The external angles of a 12-gon add up to 360 degrees so each is 30 degrees. That makes the internal angle the supplement, PQR=150 degrees.

We have an isosceles triangle so the other two angles add to 30 degrees, so 15 degrees.

Answer: 15 degrees

User Amir Sasson
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